CVE-2024-11507
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on systems running vulnerable versions of IrfanView when users open malicious DXF files. Attackers can achieve full control of the affected system through a type confusion condition in DXF file parsing. All IrfanView users who open untrusted DXF files are affected.
💻 Affected Systems
- IrfanView
📦 What is this software?
Irfanview by Irfanview
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining the same privileges as the logged-in user, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Malicious actors distributing weaponized DXF files via email or websites to execute malware, steal credentials, or establish persistence on victim systems.
If Mitigated
Limited impact with proper application sandboxing and user privilege restrictions, potentially containing the exploit to the IrfanView process only.
🎯 Exploit Status
Exploitation requires user interaction to open malicious files. The vulnerability is publicly disclosed through ZDI with technical details available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: IrfanView 4.67 and later
Vendor Advisory: https://www.irfanview.com/main_history.htm
Restart Required: No
Instructions:
1. Download IrfanView 4.67 or later from the official website. 2. Run the installer. 3. Follow installation prompts. 4. Verify installation by checking Help > About.
🔧 Temporary Workarounds
Disable DXF file association
windowsRemove IrfanView as the default handler for DXF files to prevent automatic opening
Control Panel > Default Programs > Set Associations > Find .DXF > Change program to Notepad or another safe viewer
Application sandboxing
windowsRun IrfanView in a sandboxed environment to contain potential exploits
🧯 If You Can't Patch
- Implement application control to block IrfanView execution entirely
- Educate users to never open DXF files from untrusted sources and use alternative DXF viewers
🔍 How to Verify
Check if Vulnerable:
Open IrfanView, go to Help > About, check if version is earlier than 4.67Check Version:
irfanview.exe /?Verify Fix Applied:
Confirm IrfanView version is 4.67 or later in Help > About📡 Detection & Monitoring
Log Indicators:
- IrfanView process crashes with DXF files
- Unusual child processes spawned from IrfanView
- Network connections from IrfanView to suspicious IPs
Network Indicators:
- Downloads of DXF files from untrusted sources
- HTTP requests for DXF files followed by process execution
SIEM Query:
process_name:"i_view32.exe" OR process_name:"i_view64.exe" AND (file_extension:".dxf" OR file_name:"*.dxf")